Alright folks, the new studies are in and it looks like cell phone radiation might be bad for you after all. Much, much more testing needs to be done before we can say anything conclusively, but the latest studies from the Environmental Working Group point to a very possible danger. That's the bad news.
The good news is that we have more ways than ever to avoid getting our ear and brain blasted with radiation. Try using Bluetooth or a hands-free headset device to minimize the time your phone sits next to your head. You should also try to do as much of your communicating via text messages and IMs as possible. Both of these methods result in very low/nil levels of exposure.
If you want to see just how dangerous your phone or smartphone is, you can check out the Environmental Working Group's phone ranking page. There you can search for your phone by name to find its radiation level, or browse lists noting the worst and best cell phones and smartphones in terms of radiation.
Samsung seems to be the king of the low-rad phone right now, although Nokia has quite a few safe feature phones as well. The BlackBerry Storm 9500/9530 also has an exceedingly low radioactive output. By comparison, the myTouch 3G is very high on radiation, as is the upcoming Palm Treo 600 and the BlackBerry Bold and Curve. The iPhone has some issues as well; the 3G clicks in at between .24-1.39 W/kg, while the 3GS measures between .52 and 1.19 W/kg.
Remember folks; it is our job as consumers to let the mobile manufacturers know that radiation matters to us. Read the studies, decide if you think there is a danger, and send a message to your favorite handset maker. If enough people care, they will make changes. After all, none of them want to get head cancer either.